Combo USB Hub / Beverage Warmer / Device Charger Combo USB Hub / Beverage Warmer / Device Charger Perfect for the dedicated multi-tasker! Use this 4-port USB hub to connect your USB devices, charge your cell phone or other USB device, AND keep your coffee warm! Mac & PC Compatible Perfect gift for any multi-tasking gadget freak....even if that multi-tasking gadget freak is you!